CN107349900A - A kind of heavy metal absorbent and its preparation - Google Patents
A kind of heavy metal absorbent and its preparation Download PDFInfo
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- CN107349900A CN107349900A CN201710632449.3A CN201710632449A CN107349900A CN 107349900 A CN107349900 A CN 107349900A CN 201710632449 A CN201710632449 A CN 201710632449A CN 107349900 A CN107349900 A CN 107349900A
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 27
- 239000002250 absorbent Substances 0.000 title claims abstract description 13
- 230000002745 absorbent Effects 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 32
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 15
- 239000010439 graphite Substances 0.000 claims abstract description 15
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 230000003647 oxidation Effects 0.000 claims abstract 2
- 238000003756 stirring Methods 0.000 claims description 25
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000012286 potassium permanganate Substances 0.000 claims description 6
- 235000010344 sodium nitrate Nutrition 0.000 claims description 6
- 239000004317 sodium nitrate Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 239000005457 ice water Substances 0.000 claims description 4
- 159000000003 magnesium salts Chemical class 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 4
- 239000012279 sodium borohydride Substances 0.000 claims description 4
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- NGWKGSCSHDHHAJ-YPFQVHCOSA-N Liquoric acid Chemical compound C1C[C@H](O)C(C)(C)C2CC[C@@]3(C)[C@]4(C)C[C@H]5O[C@@H]([C@](C6)(C)C(O)=O)C[C@@]5(C)[C@@H]6C4=CC(=O)C3[C@]21C NGWKGSCSHDHHAJ-YPFQVHCOSA-N 0.000 claims description 2
- 238000009938 salting Methods 0.000 claims description 2
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 239000002243 precursor Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 16
- 239000000725 suspension Substances 0.000 description 8
- 235000015165 citric acid Nutrition 0.000 description 6
- MFUVDXOKPBAHMC-UHFFFAOYSA-N magnesium;dinitrate;hexahydrate Chemical class O.O.O.O.O.O.[Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MFUVDXOKPBAHMC-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000003463 adsorbent Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 239000011240 wet gel Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- -1 magnesia graphene Compound Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000021393 food security Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
Abstract
A kind of heavy metal absorbent, including by graphene and the compound of nano magnesia composite synthesis；Wherein：The content of graphene is 0.1% 10% in compound, and the particle diameter of nano magnesia is 10nm 100nm.The preparation method of the heavy metal absorbent：Preparation, the calcining of graphene, magnesia precursor complex of the compound of the preparation of oxidation, graphene oxide, the reduction of graphene oxide, nano magnesia presoma including graphite.Compound prepared by the present invention has excellent heavy metal adsorption performance；Preparation is simple for heavy metal absorbent of the present invention simultaneously, suitable for industrialized production.
Description
Technical field
The invention belongs to the absorption of heavy metal ion and stabilization technique, more particularly, to a kind of heavy metal absorbent and its system
It is standby.
Background technology
In recent years, heavy metal pollution event in China's takes place frequently.Heavy metal element chemical property is stable, along with the quick of industry
Development and the quickening of urbanization process, the heavy metal pollution in China is increasingly severe, substantial amounts of heavy metal be discharged into soil and river,
In lake and ocean, and by number of ways such as water, gas, solid wastes, long term accumulation, food chain are enriched with step by step in the environment, are finally entered
Enter human body accumulation so that the content of beary metal for staying in human body amplifies at double, to economic development, to ecological environment, food security and
Health constitutes a serious threat.
The exploitation of high-activity nano environmental purifying agent and production technology is the important support of environmental protection industry sustainable development.Receive
Rice magnesia has that specific surface area is big, surface-active is high, and heavy metal ion has very strong adsorption capacity, meanwhile, it is nano oxidized
There is magnesium surface the defects of magnesium room and Lacking oxygen potential energy to adsorb some metals formation elementide, and metal is inhaled with defective bit
Attached effect is very strong, it might even be possible to changes the chemical property of metal cluster, is presented in Heavy Metal Pollution Control and field of environment protection
Go out unique advantage and application prospect.Graphene as a kind of New Two Dimensional carbon material, have specific surface area is big, absorption property is strong,
The advantages that radiation resistance is good, good application prospect is presented in terms of traditional adsorbent is substituted.
The content of the invention
It is an object of the invention to provide a kind of heavy metal absorbent and its preparation, solves the problems, such as that prior art is present.
A kind of heavy metal absorbent, including by graphene and the compound of nano magnesia composite synthesis, the graphene
Percentage by weight be 0.1%~10%, the particle diameter of the nano magnesia is 10nm~100nm.
A kind of preparation of heavy metal absorbent, is mainly included the following steps that：
S1. chemical oxidization method prepares graphite oxide；
S2. the step S1 graphite oxides prepared are placed in ultrasonic 2h in ultrasonic cleaning machine, obtain graphene oxide solution, to
Sodium borohydride solution is added in graphene oxide solution, sequentially adds soluble magnesium salting liquid, citric acid solution stirring；
S3. solution is heated to 80 DEG C under agitation, solution first becomes colloidal sol after 2-3h, continues to become solidifying after stirring 1-2h
Glue；
S4. step S3 is obtained into gel to be put into Muffle furnace, foam 2h at 150 DEG C；Then 450-600 in air atmosphere
DEG C calcining 1-3h.
Further, the mol ratio of citric acid and soluble magnesium salt is 1 in step S2：1.
Further, chemical oxidization method described in step S1 prepares graphite oxide and mainly included the following steps that：
S11. under the conditions of ice-water bath, the concentrated sulfuric acid is added into container, magnetic agitation, after temperature is reduced to below 4 DEG C,
Crystalline graphite powder is added, and is quickly stirred to being uniformly dispersed；
S12. sodium nitrate is added, potassium permanganate is slow added into the case of being kept stirring for, controlling reaction temperature does not surpass
4 DEG C are crossed, stirs 2h；
S13. mixture temperature is risen into 35 DEG C again to react 30 minutes, is then slowly added into distilled water, control temperature is 60
DEG C, solution is changed into yellowish-brown；
S14. 30% (v/v%) hydrogen peroxide is added after stirring reaction 1h until mixture becomes glassy yellow；
S15. and then washed repeatedly with the mixed liquor and hydrochloric acid of dilute sulfuric acid and hydrogen peroxide, be finally several with distillation water washing
Secondary, it is 7 to make pH, and obtained tan precipitate is fully dried in 50 DEG C of vacuum drying chamber.
Further, graphite oxide described in step S2：Sodium borohydride：Soluble magnesium salt：The mass ratio of citric acid is 1:
1-4:50-1000:50-1000。
Further, the crystalline graphite powder, sodium nitrate, potassium permanganate, sulfuric acid mass ratio are 2:1-3:3-6:50-80.
Compared with prior art, the present invention includes the compound by graphene and nano magnesia composite synthesis, wherein oxygen
Changing magnesium heavy metal has strong absorption property, and graphene is the conductive 2D materials of unique texture, and there is excellent electronics to shift
Performance, and nano magnesia it is compound after can improve the absorption property of heavy metal.Both interactions, it will be advantageous to nano oxygen
Change growing, disperseing for magnesium, improve its conductive capability, promote the transmission of electronics, and then improve its performance.Therefore the present invention is due to tool
Have that specific surface area is big, unique absorption advantage of 2D materials, the removal of heavy metal ion has that adsorption capacity is big, processing time
Short, the advantages that treatment effeciency is high, the processing to heavy metal ions in wastewater has remarkable result.And the present invention is coagulated using colloidal sol
Prepared by glue method is well mixed, and simple for process, suitable for industrialized production, obtained particle diameter is small, is evenly distributed, and compares surface
Product is big.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention will be made below further detailed
Description.
Embodiment 1
A kind of preparation of heavy metal absorbent, is mainly included the following steps that：
(1) using chemistry redox method synthesis graphite oxide：Under the conditions of ice-water bath, added into glass round bottom flask
The 50ml concentrated sulfuric acid (98%), magnetic agitation, after temperature is reduced to below 4 DEG C, adds 2.0g crystalline graphite powder, and quickly
Stirring the rear sodium nitrate for adding 1.0g, is slow added into 5.0g potassium permanganate, controlled to being uniformly dispersed in the case of being kept stirring for
Reaction temperature processed is no more than 4 DEG C, stirs 2h.Mixture temperature is risen into 35 DEG C again to react 30 minutes, is then slowly added into 100ml
Distilled water, control temperature at 60 DEG C, solution is changed into yellowish-brown, adds a certain amount of 30% (v/v%'s) after stirring reaction 1h
Hydrogen peroxide becomes glassy yellow until mixture.Then washed repeatedly with dilute sulfuric acid (5wt.%)+dioxygen water mixed liquid and hydrochloric acid,
Water washing with distillation several times, making its pH~7 finally, obtained tan precipitate is fully dried in 50 DEG C of vacuum drying chamber,
Obtain product graphite oxide 1.6g.
(2) sol-gal process prepares nano magnesia, graphene predecessor.Graphite oxide made from step (1) will be taken to take
0.1g is scattered in 30ml water, is ultrasonically treated 2h, obtains the graphene oxide suspension of brown, adds 250ml water, and dilution obtains
280ml graphene oxide suspensions, are kept stirring for.
(3) 0.2g sodium borohydrides are weighed, are dissolved in 20ml distilled water, are quickly poured into step (2) graphene oxide suspension
In, partial reduction graphene solution is obtained, continues to stir.
(4) 63.0g magnesium nitrate hexahydrates are weighed, adds in partial reduction graphene suspension obtained by step (3), keeps stirring
Mix until magnesium nitrate hexahydrate is completely dissolved.
(5) 36.0g citric acids (CA) are weighed and are dissolved in 100mL water, is added in step (3) resulting solution, is warming up to 80 DEG C of perseverances
Tepidarium, 4h is stirred, obtains wet gel.
(6) wet gel is put into 150 DEG C of degree drying boxes the 2h that foams, obtains xerogel.
(7) xerogel obtained by step (6) is put into after 2 DEG C/min is warming up to 450 DEG C in Muffle furnace and is incubated 2h.
Obtain the nano magnesia graphene Compound Heavy Metals adsorbent that graphene content is 1%, the adsorbent pair
Pb in 200ppm lead waste water2+Adsorption capacity be 1316mg/g.
Embodiment 2
A kind of preparation of heavy metal absorbent, is mainly included the following steps that：
(1) using chemistry redox method synthesis graphite oxide：Under the conditions of ice-water bath, added into glass round bottom flask
The 50ml concentrated sulfuric acid (98%), magnetic agitation, after temperature is reduced to below 4 DEG C, adds 2.0g crystalline graphite powder, and quickly
Stirring the rear sodium nitrate for adding 1.0g, is slow added into 5.0g potassium permanganate, controlled to being uniformly dispersed in the case of being kept stirring for
Reaction temperature processed is no more than 4 DEG C, stirs 2h.Mixture temperature is risen into 35 DEG C again to react 30 minutes, is then slowly added into 100ml
Distilled water, control temperature at 60 DEG C, solution is changed into yellowish-brown, adds a certain amount of 30% (v/v%'s) after stirring reaction 1h
Hydrogen peroxide becomes glassy yellow until mixture.Then washed repeatedly with dilute sulfuric acid (5wt%)+dioxygen water mixed liquid and hydrochloric acid,
Water washing with distillation several times, making its pH~7 finally, obtained tan precipitate is fully dried in 50 DEG C of vacuum drying chamber,
Obtain product graphite oxide 1.6g.
(2) sol-gal process prepares nano magnesia, graphene predecessor.Graphite oxide made from step (1) will be taken to take
1.0g is scattered in 30ml water, is ultrasonically treated 2h, obtains the graphene oxide suspension of brown, adds 250ml water, and dilution obtains
280ml graphene oxide suspensions, are kept stirring for.
(3) 0.2g sodium borohydrides are weighed, are dissolved in 20ml distilled water, are quickly poured into step (2) graphene oxide suspension
In, partial reduction graphene solution is obtained, continues to stir.
(4) 57.3g magnesium nitrate hexahydrates are weighed, adds in partial reduction graphene suspension obtained by step (3), keeps stirring
Mix until magnesium nitrate hexahydrate is completely dissolved.
(5) 32.0g citric acids are weighed and are dissolved in 100mL water, is added in step (3) resulting solution, is warming up to 80 DEG C of thermostatted waters
Bath, 4h is stirred, obtains wet gel.
(6) wet gel is put into 150 DEG C of degree drying boxes the 2h that foams, obtains xerogel.
(7) xerogel obtained by step (6) is put into after 2 DEG C/min is warming up to 600 DEG C in Muffle furnace and is incubated 2h.
Obtain the nano magnesia graphene Compound Heavy Metals adsorbent that graphene content is 10%, the adsorbent pair
Pb in 200ppm lead waste water2+Adsorption capacity be 1662mg/g.
Embodiment proposed by the present invention, as it will be easily appreciated by one skilled in the art that the above example table that applicant proposes
Bright technical solution of the invention is feasible.Simply embodiment described above is only presently preferred embodiments of the present invention, not
The present invention can be limited with this.All any modifications made within technical solution proposed by the present invention, equivalent substitution and change
Enter, should be included in the scope of the protection.
Claims (6)
1. a kind of heavy metal absorbent, it is characterised in that including the compound by graphene and nano magnesia composite synthesis, institute
The percentage by weight for stating graphene is 0.1%-10%, and the particle diameter of the nano magnesia is 10nm-100nm.
2. the preparation of heavy metal absorbent according to claim 1, it is characterised in that mainly include the following steps that：
S1. chemical oxidization method prepares graphite oxide；
S2. the step S1 graphite oxides prepared are placed in ultrasonic 2h in ultrasonic cleaning machine, obtain graphene oxide solution, to oxidation
Sodium borohydride solution is added in graphene solution, sequentially adds soluble magnesium salting liquid, citric acid solution stirring；
S3. solution is heated to 80 DEG C under agitation, solution first becomes colloidal sol after 2-3h, continues to become gel after stirring 1-2h；
S4. step S3 is obtained into gel to be put into Muffle furnace, foam 2h at 150 DEG C；Then in air atmosphere 450-600 DEG C forge
Burn 1-3h.
3. prepare according to claim 2, it is characterised in that the mol ratio of citric acid and soluble magnesium salt is 1 in step S2：
1。
4. prepare according to claim 2, it is characterised in that it is main to prepare graphite oxide for chemical oxidization method described in step S1
Comprise the following steps：
S11. under the conditions of ice-water bath, the concentrated sulfuric acid is added into container, magnetic agitation, after temperature is reduced to below 4 DEG C, is added
Crystalline graphite powder, and quickly stir to being uniformly dispersed；
S12. sodium nitrate is added, potassium permanganate is slow added into the case of being kept stirring for, controlling reaction temperature is no more than 4
DEG C, stir 2h；
S13. mixture temperature is risen into 35 DEG C again to react 30 minutes, is then slowly added into distilled water, control temperature is molten at 60 DEG C
Liquid is changed into yellowish-brown；
S14. 30% (v/v%) hydrogen peroxide is added after stirring reaction 1h until mixture becomes glassy yellow；
S15. and then washed, finally with water washing is distilled several times, made repeatedly with the mixed liquor and hydrochloric acid of dilute sulfuric acid and hydrogen peroxide
PH is 7, and obtained tan precipitate is fully dried in 50 DEG C of vacuum drying chamber.
5. prepare according to claim 2, it is characterised in that graphite oxide described in step S2：Sodium borohydride：Soluble magnesium
Salt：The mass ratio of citric acid is 1:1-4:50-1000:50-1000.
6. prepare according to claim 4, it is characterised in that the crystalline graphite powder, sodium nitrate, potassium permanganate, sulfuric acid matter
Amount is than being 2:1-3:3-6:50-80.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110252791A (en) * | 2019-07-08 | 2019-09-20 | 知合环境（北京）有限责任公司 | A kind of bionic plant removing heavy metal in soil pollution |
| CN112961681A (en) * | 2021-02-21 | 2021-06-15 | 冯家胜 | Conditioner for soil remediation and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252791A (en) * | 2019-07-08 | 2019-09-20 | 知合环境（北京）有限责任公司 | A kind of bionic plant removing heavy metal in soil pollution |
| CN112961681A (en) * | 2021-02-21 | 2021-06-15 | 冯家胜 | Conditioner for soil remediation and preparation method thereof |
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| CN107349900B (en) | 2018-07-31 |
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